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T. M. NORTH. BBD' MoIIoN POR PRINTING MACHINES.

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Patented Apr. 16, 1895.

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BED MOTION POR PRINTING MACHINES.

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' No. 537,581. .Patented Apr. 16, 1895.

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rra@ STATES PATENT Ormea.

THOMAS M. NORTH, BROOKLYN, ASSIGNOR TO ROBERT HOE, THEODORE H. MEAD, AND CHARLES W. CARPENTER, OF NEW YORK, N. Y.

BED-MOTION FOR PRINTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 537,581, dated April 16, 1895.

Application nea February 28,1894. Serina). 501,779. (Nomad.)

To all La7/1,071@ mag/ concern: l

Be it known that I, THOMAS M. NORTH, a

subject of the Queenof Great Britain, resid- .ing at Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Bed-Motions for PrintingMachines, fully described-and represented in the following specification and the accompanying drawings, forming a part of the same.

The present improvements relate to that class of printing machines in which the type carrying bed, reciprocates horizontally in cooperation with a rotative impression cylinder,

The object of the invention is to so drive the reciprocating bed that While its rectilinear movement may be made at a high rate of speed during its movement of printing and also during its return or non-printing movement, the reversing operations of stopping its movement in one direction and starting it in the other, at both ends of its stroke, may be accomplished by a crank movement, whereby the reversal of the bed may be accomplished without strain or jar.

To that end theinvention, generally stated, consists in the combination with the reciproeating bed, of two racks alternately engaged by a driving pinion for moving the bed during the major part of its stroke in either direction, of a reversing mechanism consisting of a hanger attached to the bed and carrying a movable stud, and a rotative socket or crank arm operating at the end of the stroke of the bed to impart a crank motion to said stud.

Modifications, extensions and various combinations of mechanisms are also embraced in the invention, all of which are so particularly pointed out in the claims, as to need no further preliminary setting forth.

One embodiment of the invention is illustrated in the accompanying drawings, in which- Figure 1 is a side'elevation of a printing machine equipped with the present improvements. Fig. 2 is a plan view thereof, the printing cylinder being removed and a portion of the type bed so as to expose the mechanisms beneath them. Fig. 3 is a partial end elevation as seen in the direction of the outside arrow in Fig. `1. Fig. 4 is a side elevation of a guard, a disk and a guide. Fig. 5 is an enlarged side elevation of the reversing devices. Fig. 6 represents a side elevation of a disk anda guard in which the curved pathway varies from a true arc.

The invention is applicable to the various formsof cylinder printing machines, as is set forth in United States Patent No. 477,045.

In its general features, the printing machine selected to illustrate an embodiment of this invention, is one of ordinary construction consisting of an impression cylinder ll and a reciprocating type bed B, which travel in unison dnring the pri-nting operation in the usual way, the gearing connecting themV together and with the driving shaft being omitted, as many forms of it may be adopted, such, for instance, as is shown in said patent. The type bed B travels on ways 47,48, as usual and is provided with two facing racks l2, 13, fast to its under side, which racks are so positioned that they may be engaged, one at a time, by the driving pinion 9, as is seen in Fig. 3,-said pinion 9 being mounted to slide on a stationary shaft 10 and made of double width, so that while it will remain constantly geared with its driving wheel 8, it may alternately gear with the bed racks 12, 13, its upper face engaging the rack 12 and its lower face the rack 13, as will hereinafter appear. Its driving'wheel 8 is mounted upon a shaft 20, the other end of which carries a Wheel 30 receiving movement from a pinion 32, on the main driving shaft 2l that is furnished, as is usual, with fast and loose driving pulleys 40, 41. The bed driving pinion 9 operates to drive the type bed B throughout the major part of its reciprocation, moving itin the printing direction, or that of the arrow, while engaged with the upper rack 12, as in Fig. 1, or, in the contrary direction when said pinion is engaged with its lower rack 13. Iuorder that it may engage alternately, first with one rack and then with the other, said pinion 9 is constructed so as to slide longitudinally upon the shaft 10 and be moved from one rack to the other. It is provided at one side with a col lar 2, sliding with it, into which collar the upper end of a pivoted lever 14 enters, said lever having a rock arm 33 at its lower end, a stud upon which enters the slotof a cam 42 which latter is rotated to vibrate said lever at suitable intervals, by means of a shaft 43 having a wheel 44 driven by the outside train. As the pinion 9 revolves at a fixed point, it is obvious that the racks 12, 13 will run out of said pinion at the end of the major part of their travel in either direction, and since during either ot' said movements, in which the heavy type bed is traveling it must be stopped when the end of such movement is reached, and reversed, so that it may take up the contrary movement, it follows that this reversing operation must be accomplished, as one rack leaves the pinion 9, by means capable of overcomingits momentum and graduallyarresting the high or normal speed at which it is moving, by progressively slowing it down until a state of rest is attained; and, thereafter operate to overcome its intertia in starting the bed, in the opposite direction, and impart to it an accelerated movement which must attain the normal speed of the bed at the time when the said pinion 9 gears with the other rack to drive the bed. To accomplish this reversing movement the bed is provided with a hanger l-l fixedly depending from nearly a central point of the bed and preferably having its lower end arranged to slide in alongitudinal groove or guideway G sustained lixedly by the main frame. This hanger is preferably provided with a straight and vertical slot S, that guides a sliding block 11, in which is carried a stud 6, that is preferably provided with a friction roller 3, which roller travels on a guide formed by an upper rail 16 and a lower rail 17, as best seen in Fig. 5, which rails 16, 1.7 are united at each end by inwardly curved continuations, said guide being supported rigidly in place by means of shafts 26 36. The guide thus consists of straight and parallel upper and lower guideways connected at each end by curved and preferably semi-circular guideways, and the latter are provided with curved guards 15, 18, having curved faces that act as outside members of the curved parts of said guideways. While the stud 6 or its roller 3 travels upon the guide rail 16, that rail of course prevents the sliding block 11 in which the stud 6 is carried, from moving downward and while it is traveling upon the guide rail 17, that rail similarly prevents the block from moving upward, and the curved pathway at each end of said guide, as it is traversed by the said stud 6 or roller 3, directs it from the upper horizontal path of travel to the lower horizontal path of travel and vice versa.

The shafts 26, 36 carry fast to their inner ends, crank disks 23, 24 (they may be crank arms) provided with curved sockets 4, 5, into which the stud 6 periodically enters, and is seated and driven, said shafts 26, 36 being respectively provided on their outer ends with Wheels 27, 37, which are geared respectively by means of the intermediates 2S, 38, with the wheel 30 and thus rotate in unison or at a like surface speed with the driving pinion 9;

and, in order that the sliding or shifting movement of the pinion 9 may be accomplished in unison with the driving movements of these devices, the wheel 44 on the cam shaft 43 is driven by a pinion 45 on a stud which carries a wheel 46 that meshes with and is driven from the wheel 27.

As illustrated in Figs. 1 to 4 inclusive, the type bed having been moved in a direction to the right, is in a state of rest., being ready to begin its return movement, in the direction of the arrow, to complete the inking of the form and to carry the bed to the opposite end of the machine or make its printing run, in which illustrated position the stud 6 carried in the block 11 is on its center of movement, said stud being embraced in the socket 5 of the crank arm and held therein by the guard 16.

In Fig. 5 the bed B is supposed to be running in the direction of the arrow thereon or about to finish its return or non-printing movement, the major part of which movement has been accomplished by the pinion 9 while meshed with the lower rack 13.

vAs the stud 6, carried in the block 1l that slides in the hanger attached to the bed, approaches and passes its high point (dotted lines upper right hand portion of Fig. 5) the rotation of the disk 24 in the direction indicated, will have caused its socket 5 to approach, enter under and thus receive or cmbrace the said stud 6, during the accomplishment of which, the pinion 9 will have disengaged the rack 13 by the latter running out of mesh therewith, both of which operations are performed while the bed and said parts are moving at uniform speed, which is the normal speed of the machine. This movement of the bed is now required to beslowed down so as to arrest it, and then a new movement caused to be made in the contrary or printing direction. This is effected during the time that the socket disk 24 is the driver; and, the stud 6, having entered the socket 5, as the latter reaches the highest point of its travel, will, while traveling to its outer quarter point (as in Fig. 4), being held within the entrance of the socket 5 by means of the curved guard 18, cause the stud 6 to travel in the curved pathway formed by the guide and guard, and simultaneously to descend in the hanger H, its onward movement, and consequently that ofthe bed, being progressively retarded until a state of rest is attained as in Fig. 1, when the bed has reached its limit of movementl to the right. While the stud Gis traversing the curved pathway formed by the guide and guard, and moving from its outer quarter point to its lowest point, it will have descended to its limiten the hanger H and caused the bed to be started from a state of rest and moved in a contrary direction or toward the left, such movement having been accelerated until the stud 6 has reached the dotted lower position, right hand portion of Fig. 5. At a convenient time during the movements just described, the cam 42 ICO IIO

will have so rotated as to have moved the pinion`9 into the position shown in Fig. 3, where it is in alignment with and may be engaged by the upper rack 12; and, as the stud 6 approaches and passes its lowest point of travel, it will follow the lower guide rail 17, the rotation of the disk 24 will have caused the socket 5 to be withdrawn from the stud G, and, the rack 12 will mesh with the pinion 9, all of which movements are progressively accomplished while said parts are moving conccrtedly at the normal speed of the machine. he pinion 9 is now the solo driver of the bed through the rack 12, and thus moves the bed throughout the major part of its printing run, the disks 24, 23 meanwhile moving at appropriate speed but without performing work. When the stud 6 approaches and passes the lowest point of the rotative movement of the socket 4 of the disk 23, (dot ted lines, left hand lower portion of Fig. 5) it will gradually pass into the embrace of the socket 4 and be made to follow't-he curved pathway formed by the guide and guard 15, during which entrance of the stud 6 into the socket 4, the `rack 12 will run out of engagement with the pinion 9 leaving the bed driven solely by the socket 4. As the stud 6 is car ried into the curved pathway from its lowest point of travel, at this end of the machine, to its quarter point, it will be raised in the hanger H and thus progressively retard the bed until a stateof rest isv attained, at which time the bed will have reached the limit of its movement to the left, and while the stud 6 is carried in the curved pathway from said quarter point to its highest point at this end Vof the machine it will have been raised to its upward limit in the hanger H and have caused the bed to be started from a state of rest and moved in a contrary direction, as to the right, such movement having been accelerated until the stud 6 has reached the dotted upper position, left hand portion of Fig. 5. At a convenient time during the movements just described the cam 42 will have so rotated as to have moved the4 pinion 9 into a position of alignment with the rack 13; and, as the stud 6 approaches and passes its highest point of travel it will follow the upper rail 16 of the guide, the rotation of the disk 23 will have caused the socket 4 to be withdrawn from the shaft, and, the rack 13 will mesh with the pinion 9, all of which movements are progressively accomplished when said parts are Inoving concertedly at the normal speed of the machine. The pinion 9 now again becomes the sole driver of the bed through the rack 13 and thus moves the bed throughoutthe major part of its non-printing run, the disks 23, 24 again running Without performing work. When the stud 6 is again brought into position therefor it is embraced by the socket 5, and the operations described are repeated.

The stud G has alone been alluded to in this description of the operation, and for a consideration of the scope of this invention it may be assumed that said stud has its body embraced by the sockets 4 and 5, and its end confined in the circular pathway formed by theguide and the guards 15, 18 during the reversing operation; but, as it is desirable that the portion of it which travels in these circular pathways and in contact with the guide rails shall be prevented from speedy Wear, it is preferred to provide it with the friction roller 3. Hence the latter mayor may not be present.

The disks 23, 24, are desirable as the carriers for the sockets 4, 5, since that structure is a well balanced one and conduces to smooth running, but these sockets may be at the ends of arms, if desired, but preferably disks are used.

By this construction a single hanger and sliding driving stud are made use of and movements imparted to said stud by means of the sockets 4 or 5, which is a true crank movement and consequently one not only affording the shortesttravel in the reversing operation, but providing a powerful device best calculated to arrest the momentum of the heavy bed without jarring the machine, as we ll as to overcomethe inertia of the bed in setting it into motion.

The curved pathway may be varied, and, in some printing machines it will be desirable, to vary its curvature from an arc, so as to cause portions of the movements it imparts to be slower or faster than would he accomplished by an arc. iThis is shown in Fig. G from an inspection of which itwillbe readily understood without further explanation.

Many'arrangements of two racks, one driving pinion and means for alternately gearing the pinion with one and then with theother rack, may be used, that illustrated being a simple and effective one.

What I claim is- 1. The combination with the bed and a mechanism operating to drive it throughout the principal extent of its movement in either direction, of a hanger attached to the bed a movable stud carried by the hanger, and means engaging said stud and causing it to simultaneously move in a curved pathway and relatively to said hanger, substantially as described.

2. The combination with the type bed, its companion racks, a driving pinion therefor, and means causing it to alternately engage said racks, of a hanger attached to the bed, a traveling stud carried by the hanger, and a rotative part having a socket at the end of the main stroke for reversing the travel of said stud, substantially as described.

y 3. The combination with the type bed, its companion racks, a driving pinion therefor and means causing it toV alternately engage said racks, of a hanger attached to the bed, a traveling stud carried by the hanger, and, a rotative part having a socket at each end of the main strokes for reversing the travel of said stud, substantially as described.

IOO

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4. The combination with the type bed, its companion racks, a driving pinion therefor and means causing it to alternately engage said racks, of a hanger attached to the bed, a traveling stud carried by the hanger, a rotative' part having a socket at the end of the main stroke, and, a guard for retaining the stud in said socket, during the reversing operation, substantially as described.

5. The combination with the type bed, its companion racks, a driving pinion therefor and means causing it to alternately engage said racks, of a hanger attached to the bed, a traveling stud carried by the hanger, a rotative part having a socket at each end of the main strokes, and, guards for retaining the stud in said sockets, during the reversing operations, substantially as described.

G. The combination with the type bed, its companion racks, a drivingfpinion therefor and means causing it to alternately engage said racks, of a hanger attached to the bed, a traveling stud carried by the hanger, a rotat tive part having a socket at the end of the 8. The combination with the type bed, its companion racks, a driving pinion therefor and means causing it to alternately engage said racks, of a hanger attached to the bed,a traveling stud carried by the hanger, a rotative part having asocket and a curved guide at each end of the main stroke, guiding rails connecting the curved guides, and a curved guard coacting with each curved guide, substantially as described.

9. The combination with the type bed, its companion racks, a driving pinion therefor and means causing it to alternately engage said racks, of a hanger attached to the bed, a traveling stud carried by the hanger, that is provided with a friction roller, a rotative part having a socket to receive the body of said stud, a guard and a guide forming a curved pathway for its roller during the reversing operation, substantially as described.

l0. The combination with the type bed, its companion racks,a driving pinion therefor and means causing it to alternately engage said racks, of a hanger attached to the bed, a traveling stud carried by the hanger, that is provided with a friction roller, a rotative part having a socket to receive the body of said stud, a guard and a guide forming a curved pathway for its roller, during the reversing operation at each end of the stroke of the bed, substantially as described.

In testimony whereof I have hereunto set my handin the presence of two subscribing witnesses.

THOMAS M. NORTH. Witnesses:

RICHARD KELLY, OTTO L. RAABE. 

